Non-return valve (NRV) must be fitted to prevent backflow of water and air to the pump, which will cause damage to the pump.
It can be fitted between the pump and the anti vibration coupler.
Non-return valves MUST NOT be fitted in the discharge pipework between the pump outlets and the system outlets unless specified by Salamander Pumps
Product code: ACCCNRVME01
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The Salamander Pumps' accessories can aid installation, protect the pump from common causes of damage and assist in minimising the noise of the installation.